Sony Ps vita slim 2001 turns on and turns off

Greetings, someone who can help me with the diagram of the ps vita slim 2001 since it turns on and turns off after a few seconds, I was able to measure the voltage in one of the circuits and the current is still not stable and then it goes down, I understand that this is the problem. problem, but I can't find the diagram to see which component is causing it. If anyone knows and can help me, I would really appreciate it. Regards and God bless you